98
Speed Reference
When a device is commanding “local” control, the port that is commanding it has
exclusive start control (in addition to ref select), essentially overriding the Sleep/
Wake function, and allowing the drive to run in the presence of a sleep situation.
This holds true even for the case of Port 0, where a digital input start or run will be
able to override a sleep situation.
Sleep/Wake Sources
The analog source for the sleep-wake function can be any analog input, whether it
is being used for another function or not. Configuring the sleep-wake source is done
through [Sleep-Wake Ref]. Also, [Analog In X Hi] and [Analog In X Lo]
parameters have no affect on the function. However, the factory calibrated result is
used. In addition, the absolute value of the calibrated result is used, thus making the
function useful for bipolar direction applications. The analog in loss function is
unaffected and therefore operational with the Sleep-Wake function, but not tied to
the sleep or wake levels.
Speed Reference
The speed reference can come from a variety of sources that can be selected
through digital inputs or via bit manipulation of the Network Logic Command
Word.
•
HIM (local or remote)
•
Analog Input
•
Preset Speed Parameter
•
Jog Speed Parameter
•
Network Communications
•
Process PI Loop
•
MOP
Figure 16 Speed Reference Selection
Important:
Speed Reference A is the normal speed reference used. To choose a
source for this reference, make a selection in [Speed Ref A Sel],
parameter 90. Also, when the network (Logic Command Word) is
used to choose a speed reference, refer to Appendix A in the
PowerFlex 70 or 700 User Manual for detailed operation.
70EC
700VC
700H
✔ ✔
= Default
Speed Ref B Sel, Parameter 093
Preset Speed 2, Parameter 102
Preset Speed 3, Parameter 103
Preset Speed 4, Parameter 104
Preset Speed 5, Parameter 105
Preset Speed 6, Parameter 106
Preset Speed 7, Parameter 107
TB Man Ref Sel, Parameter 096
Digital Input
DPI Port Ref 1-6, See Parameter 209
DPI Command
Jog Speed, Parameter 100
Jog Command
HIM Requesting Auto/Manual
Trim
[Digital Inx Select]:
Speed Sel 3 2 1
0 0 1
0 1 1
0 1 0
1 0 0
1 0 1
1 1 0
1 1 1
Auto
Man
Drive Ref Rslt
Commanded
Frequency
Min/Max Speed
Acc/Dec Ramp
and
S Curve
Pure Reference
Post Ramp
to follower drive for
Frequency Reference
to follower drive for
Frequency Reference
Auto Speed Ref Options
Manual Speed Ref Options
Slip Compensation
1 "Slip Comp"
None
0 "Open Loop"
PI Output
2 "Process Pi"
Speed Adders
[Speed Mode]:
PI Exclusive Mode
[PI Configuration]:
Bit 0, Excl Mode = 0
Output Frequency
Mod Functions
(Skip, Clamp,
Direction, etc.)
Speed Ref A Sel, Parameter 090
0 0 0